KR20170000849A - Degreasing system and degreasing method for steam generator tubes in nuclear power plants - Google Patents

Abstract

The present invention relates to a system and a method for degreasing a heat pipe tube of a steam generator of a nuclear power plant. The system for degreasing the heat pipe tube of the steam generator of the nuclear power plant includes: an inner surface degreasing unit cleaning the heat pipe tube by injecting a cleaning solution into an open side of the heat pipe tube at a high speed; an outer surface degreasing unit composed of a chamber partially covering an outer circumference of the heat pipe tube and a cleaning solution injecting nozzle embedded in the chamber and injecting a degreasing solution to the outer circumference of the heat pipe tube penetrating through the chamber with the injecting nozzle; and a circulation unit composed of a cleaning solution tank, a cleaning solution supply pipe supplying the cleaning solution to the inner surface degreasing unit and the outer surface degreasing unit from the cleaning solution storing tank, and a cleaning solution return pipe returning the cleaning solution discharged from the inner surface degreasing unit and the outer surface degreasing unit to the cleaning solution tank. Accordingly, the purpose of the present invention is to provide the system and the method for degreasing the heat pipe tube of the steam generator of the nuclear power plant capable of omitting a large-scaled facility for degreasing equipment, preventing huge degreasing solution consumption for degreasing, preventing huge and small accidents which may occur when transferring the multiple heat pipe tubes at the same time to degrease the multiple heat pipe tubes at the same time, and remarkably reducing cleaning water consumption and degreasing solution consumption by degreasing the multiple heat pipe tubes with an amount of the degreasing solution enough for degreasing one heat pipe tube by circulating the degreasing solution.

Description

Technical Field [0001] The present invention relates to a steam degassing system and a degreasing method for a steam generator tube of a nuclear power plant,

The present invention relates to a tube degassing system for a steam generator tube of a nuclear power plant, and more particularly, to a tube degassing system and a degassing method for a steam generator tube of a nuclear power plant, which are combined with internal degreasing and external degreasing of a tube of a heat transfer tube.

In a pressurized water reactor, which is common to domestic nuclear power plants, the pressurized coolant transfers the heat of the reactor to the steam generator and then returns to the reactor. The steam is evaporated by the heat received from the primary system in the steam generator, And a third system which is a circulation path of cooling water passing through the inside of the condenser constituting the second system, and the third system which is the circulation path of the cooling water passing through the inside of the condenser constituting the second system, which is a circulation cycle in which the steam driving the turbine is condensed in the condenser and returned to the steam generator.

In this case, the heat transfer pipe is a tube through which the coolant flows in the primary system, and is disposed inside the primary system and the steam generator 2, thereby exchanging heat between the primary system and the secondary system. At this time, heat exchange occurs between the inner surface of the heat transfer pipe and the outer surface.

In the manufacturing process of the tube of the heat transfer pipe, oil residue and other foreign substances such as processed oil and grease are adhered to the inner and outer surfaces of the tube. Therefore, the manufactured heat transfer tube should be degreased and cleaned to remove oil and foreign matter adhered to the inner and outer surfaces.

In Korea, generally, tube degreasing is performed by immersing a plurality of tubes in a large tank filled with a degreasing solution.

However, the tube length of a nuclear steam generator tube reaches up to 28m, so if it is defatted by a water tank method, it should have a large water tank of 30m width 2m high 4m.

These tanks occupy a large area, and a large amount of wastewater is discharged from the water tank when the degreasing solution is replaced.

In addition, the manual operation of the crane by the operator to carry a long tube bundle of more than 20 meters long is a skill requiring a great deal of proficiency. As a result of slight negligence or mistake, the tube bundle collides with the water tank, It has been investigated that it occurs frequently in the field.

At this time, the integrity of the tube is directly related to the safety of the reactor, so the damaged tube is forced to be discarded.

A conventional tube cleaning apparatus can be used without using a bulky water tank, as disclosed in Japanese Patent Application Laid-Open No. 8-71520 (published on March 03, 1996) .

[0002] The above-mentioned prior art relates to a cleaning device in a pipe equipped with a rotating brush that can be inserted into a pipe so that the inside of the pipe can be cleaned without a large water tank, and the cleaning fluid is sprayed from the tip of the rotating brush and can be physically cleaned And an elastic body which can be inserted into a curved tube is also provided.

However, since there is no means for cleaning the outer surface of the tube in that it is a device for cleaning the already installed curved tube, a large water tank is required for cleaning the outer surface of the tube, and there is no means for saving the washing liquid and the washing water , The cleaning head needs to pass all the parts requiring cleaning, so that it takes a lot of time to clean a plurality of pipes.

Therefore, it is possible to degrease both the inner surface and the outer surface by injecting the tube of the heat transfer pipe in a single unit, and to degrease the tube of the heat transfer pipe without a large water tank, and to achieve a great reduction in the amount of the degreasing liquid and water required for degreasing, There is a need for a degreasing system in which more effective degreasing is performed.

Japanese Patent Application Laid-Open No. 8-71520 (published date: March 03, 1996)

Accordingly, it is an object of the present invention to solve the problems of the prior art, and it is an object of the present invention to provide a heat transfer tube which is capable of putting the heat transfer tube in a single unit and degreasing the inner surface and the outer surface, It is desired to provide a degreasing system and a degreasing method of a steam generator tube of a nuclear power plant steam generator which can significantly reduce the amount of water and water and perform degreasing more effectively than the degreasing of the water tank system .

In order to accomplish the above object, according to the present invention, there is provided a system for degassing a heat transfer tube of a nuclear power plant steam generator tube, comprising: An outer surface degreasing part for spraying the degreasing liquid to the outer circumferential surface of the heat transfer tube passing through the inside of the chamber and a cleaning liquid storage tank for holding the cleaning liquid in the chamber, A cleaning liquid supply pipe for supplying the cleaning liquid from the cleaning liquid storage tank to the inner surface degreasing unit and the outer surface degreasing unit, and a circulation unit including a cleaning liquid return pipe for returning the cleaning liquid discharged from the inner surface degreasing unit and the outer surface degreasing unit to the cleaning liquid storage tank.

The method for degassing a tube of a nuclear power plant steam generator according to the present invention is a method for degreasing a tube of a heat transfer tube using the heat transfer tube tube degreasing system according to the present invention,

A first step of injecting a cleaning liquid into one opened side of the heat transfer tube by using a cleaning liquid supplied from the cleaning liquid tank to remove oil on the inner surface of the heat transfer tube; A second step of recovering the cleaning liquid discharged when the discharge tube is discharged to the side of the tube of the heat transfer tube and transferring the cleaning liquid to the cleaning liquid tank, passing the heat transfer tube tube from which the oil on the inner surface is removed to the inside of the chamber, And a fourth step of recovering the cleaning liquid sprayed on the outer surface of the heat transfer pipe and transferring the cleaning liquid to the cleaning liquid tank.

The tube degreasing system and the degreasing method of a steam generator tube of a nuclear power plant according to the present invention have the following effects.

First, even if the degreasing means is coupled to only one portion of the tube, it is possible to degrade the inner surface and the outer surface of the entire tube, so that the tubes can be washed one by one and washed in a unit, It is not necessary to degas multiple tubes at the same time, 1) a large-scale facility for degreasing facilities is not necessary, 2) a great amount of degreasing solution does not need to be consumed for degreasing, and 3) The risk of large and small accidents that may occur while carrying several heat tubes at the same time to degrease is avoided.

Second, since the degreasing liquid is circulated, it is possible to degrease a plurality of heat transfer tubes by using a degreasing liquid for degreasing one heat transfer tube, so that the required amount of the degreasing liquid and the degreasing water can be remarkably saved.

Third, since the degreasing liquid used for degreasing the inner surface of the heat transfer pipe is also used for degreasing the outer surface, the amount of the degreasing liquid and the degreasing water can be further saved.

Fourthly, the inner degreasing and the outer degreasing are solved by one system, while the inner degreasing part and the outer degreasing part are disposed parallel to each other with respect to the longitudinal direction of the heat transfer tube, .

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a configuration diagram showing the entire configuration of the present invention,
2 is a plan view, a front view and a side view of the inner surface degreasing unit in the present invention,
3 is a front sectional view and a side view showing a bubble generating nozzle in the inner surface degreasing portion of the present invention,
Fig. 4 is a front sectional view showing a water drain in the inner surface degreasing part of the present invention, Fig.
5 is a plan view and a side view showing the outer surface degreasing unit of the present invention,
FIG. 6 is a front sectional view and a side sectional view showing a nozzle chamber in the outer surface degreasing section of the present invention,
7A is a front sectional view showing each of the cleaning liquid tanks and the feed motor constituting the circulation part of the present invention,
7B is a front view, side sectional view and front sectional view showing one cleaning liquid tank at 7a,

The specific structure or functional description presented in the embodiment of the present invention is merely illustrative for the purpose of illustrating an embodiment according to the concept of the present invention, and embodiments according to the concept of the present invention can be implemented in various forms. And should not be construed as limited to the embodiments described herein, but should be understood to include all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will become more apparent by describing in detail preferred embodiments thereof with reference to the attached drawings in which:

2 is a plan view, a front view and a side view of the inner surface degreasing unit 10 of the configuration shown in FIG. 1,

FIG. 3 is a side sectional view and a front view showing a bubble generating nozzle 11 for injecting a cleaning liquid and air together at one opened side of the tube of the heat transfer tube T in the inner surface cleaning section of FIG. 2,

4 is a view showing the installation height of the drain tube 17 connected to the drain tube 17 and the installation height of the drain tube 17 connecting the cleaning liquid discharged from the other side of the heat pipe tube T in the inner surface cleaning section of FIG. Sectional view showing two embodiments in which the first and second embodiments are different from each other,

FIG. 5 is a plan view and a front view of the outer surface cleaning unit shown in FIG. 1,

6 is a view showing two front section views, one front view and a side sectional view showing one of a plurality of nozzle chambers in the outer surface cleaning section of FIG. 5,

7A is a view showing a transfer pump motor for transferring a preliminary degreasing liquid tank, a degreasing liquid tank, a bath washing liquid tank, a washing liquid tank, a preliminary degreasing liquid, a degreasing liquid, a bath washing liquid, and a washing liquid,

7B is a front view, side sectional view, and front sectional view showing any one of the tanks.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following detailed description of the present invention, the overall structure of the present invention, the brief features of each element, and the relationship between the elements will be briefly described.

First, the present invention will be briefly described.

As shown in FIG. 1, the system for degassing a nuclear power plant steam generator tube (T) according to the present invention comprises an inner surface degreasing unit 10, an outer surface degreasing unit 20, and a circulation unit.

The inner surface degreasing unit 10 is configured to degrease the inner circumferential surface of the heat transfer pipe T by spraying the cleaning liquid at a high speed toward one opened side of the heat transfer pipe T.

The outer surface degreasing unit 20 includes a nozzle chamber 21 surrounding a part of the outer circumferential surface of the heat transfer pipe T and a cleaning liquid injection nozzle housed in the nozzle chamber 21, T of the heat transfer pipe T is degreased by spraying the degreasing liquid onto the outer circumferential surface of the heat transfer pipe T with the injection nozzle.

The circulation part includes a cleaning liquid storage tank for storing the cleaning liquid and a supply pipe 32 for supplying the cleaning liquid of the cleaning liquid storage tank to the inner degreasing part 10 and the outer surface degreasing part 20 and the inner surface degreasing part 10 and the outer surface degreasing part 20, and a recovery tube for recovering the washing liquid discharged from the washing liquid storage tank 311, 312, 313, 314, and then returning the washing liquid to the washing liquid storage tanks 311, 312, 313, 314.

Accordingly, in the present invention, the cleaning liquid is supplied from the common cleaning liquid storage tanks 311, 312, 313, and 314 to the inner surface degreasing unit 10 and the outer surface degreasing unit 20, and the cleaning liquid discharged after the degreasing is recovered to the common cleaning liquid storage tanks 311, 312, The amount of the washing liquid and the washing water is remarkably reduced by recycling the washing liquid circulated.

As a means for degreasing, the inner degreasing unit 10 is provided with a means for injecting the degreasing liquid into one opened side of the heat transfer tube T. The outer degreasing unit 20 surrounds only a part of the heat transfer tube T The nozzle chamber 21 capable of degreasing the entire outer circumferential surface of the heat transfer tube T by passing the entire heat transfer tube T is provided so that it is not necessary to have a large water bath which can lock the entire heat transfer tube T unlike the conventional one.

Hereinafter, the detailed features of each configuration described above, and the functional relationship between each configuration will be described in detail.

Prior to the detailed description, the 'washing liquid' may be subdivided into a preliminary degreasing liquid, a degreasing liquid, a bath liquid, and a wash liquid.

In this case, the 'washing liquid storage tank' refers to a total of four tanks as the pre-degreasing liquid storage tanks 312, 311, the degreasing liquid storage tanks 312, the bath liquid storage tanks 313 and the wash liquid storage tanks 314 .

In this case, the supply pipe 32 connecting the circulation unit and the inner surface degreasing unit 10 includes a first supply pipe 32 connecting the preliminary degreasing solution storage tank 311 and the inner surface degreasing unit 10, A second supply pipe 32 for connecting the inner tank degreasing unit 10 and the inner tank degreasing unit 10 to each other, a third supply pipe 32 for connecting the inner tank degreasing unit 10 and the inner tank degreasing unit 10,

A fourth supply pipe 32 connecting the pre-degreasing solution storage tank 311 and the outer surface degreasing unit 20, a fifth supply pipe 32 connecting the degreasing solution storage tank 312 and the outer surface degreasing unit 20, A sixth supply pipe 32 connecting the liquid storage tank 313 and the outer surface degreasing unit 20 and a seventh supply pipe 32 connecting the wash liquid storage tank 314 and the outer surface degreasing unit 20 .

Further, the recovery pipe connecting the circulation part to the inner surface degreasing unit 10 comprises a first recovery pipe for recovering the preliminary degreasing solution, a second recovery pipe for recovering the degreasing solution, and a third recovery pipe for recovering the tannage solution under,

The recovery pipe connecting the circulation unit and the outer surface degreasing unit 20 includes a fourth recovery pipe for recovering the preliminary degreasing solution, a fifth recovery pipe for recovering the degreasing solution, a sixth recovery pipe for recovering the tannage solution, The seventh water pipe.

One reference point does not need to be rinsed in the inner degreasing unit 10, so that the water storage tank and the inner surface degreasing unit 10 are not connected. However, it should be noted that the washing process may be performed in the inner surface degreasing unit 10 as occasion demands.

Therefore, in the following description, it is assumed that the degreasing process is divided into preliminary degreasing, degreasing, blanketing, and water washing. The preliminary degreasing solution, the degreasing solution, the bathing solution and the washing solution are expressed as' degreasing solution, The pre-degreasing liquid storage tank 311, the degreasing liquid storage tank 312, the bath liquid storage tank 313 and the wash liquid storage tank 314 are expressed as' storage tank 31 such as a degreasing solution, Degreasing, degreasing, bending and washing are referred to as 'degreasing'.

Since the inner degreasing unit 10 is a process of injecting a degreasing liquid or the like into an open side of the heat transfer pipe T as described above, a degreasing liquid injecting unit is required. What is proposed in the present invention as the degreasing solution injection means is the bubble generating nozzle 11.

As shown in FIG. 2, the bubble generating nozzle 11 is coupled to one side of the heat transfer pipe T to discharge a degreasing liquid or the like into the heat transfer pipe T.

The detailed structure of the bubble generating nozzle 11 is as shown in Fig.

3, the bubble generating nozzle 11 is provided with a degreasing solution inlet 111 which is basically supplied with a degreasing solution or the like, and an air inlet 112 for receiving compressed air for bubble generation . However, the concrete shape and position of the degreasing solution inlet 111 and the air inlet 112 are not limited to those shown in Fig.

The degreasing liquid or the like injected into the degreasing solution inlet 111 and the air injected into the air inlet 112 are injected rightward on the side sectional view of FIG. And the air flows into the air discharge pipe 114 formed around the degreasing solution discharge pipe 113.

3, the degreasing solution jetting ports 116 are gathered at the center of the bubble generating nozzle 11 in correspondence with the arrangement of the degreasing solution discharge tube 113 and the air discharge tube 114, Lt; RTI ID = 0.0 > 115 < / RTI >

The positions of the degreasing solution jetting port 116 and the air jetting port 115 may be exchanged with each other. However, if the degreasing solution jetting port 116 is in the vicinity, the air jetted from the air jetting port 115 and the air jetted from the degreasing solution jetting port 116 Degreasing liquid, etc. are separated from each other and progressed by a certain distance, the progress of the degreasing solution is changed from laminar flow to turbulent flow and mixed with air to generate bubbles.

This is because a space with low air pressure is generated between the flow of injected air and the inner circumferential surface of the heat transfer pipe T to provide a frame through which the degreasing liquid and the like can continue to flow in a stable laminar flow.

Therefore, if a jetting port, such as a degreasing liquid, is disposed at the center of the bubble generating nozzle 11 and the air jetting port 115 is disposed around the jetting port 115, a degreasing liquid or the like, which is an amorphous liquid, Since the surrounding terrains disappear and are sprayed, they are transited into turbulence in a relatively short period of time, so that the degreasing liquid and the like may smoothly mix with the air to generate bubbles.

The degreasing liquid sprayed from the bubble generating nozzle 11 is mixed with the air jetted at high speed so that the bubble collides with the inner surface of the tube T without any physical damage, A much more effective degreasing is achieved.

This effective degreasing not only improves the efficiency of the inner degreasing, but also shortens the time required for the inner degreasing process.

The inner degreasing unit 10 may further include a grasping means for grasping the outer peripheral surface of the heat transfer pipe T so that the degreasing action of the bubble generating nozzle 11 can be stably performed, as shown in FIG.

2, two holding chucks 15 corresponding to the shape of the half of the outer circumferential surface of the heat transfer tube T are held on the heat transfer tube T on both sides and grip the heat transfer tube T, Or the like.

At this time, the two fixing chucks 15 may be driven by hydraulic or pneumatic cylinders or other known means. The two fixing chucks 15 are installed at a plurality of positions along the longitudinal direction of the heat transfer tube T so that the entire heat transfer tube T can be stably held.

In addition to the fixing chuck 15 for holding the tube T, a guide bracket for guiding the tube T may be installed so that the tube T is accurately positioned at a position where the inner surface of the tube T is degreased.

As shown in Fig. 2, there is a small object in close contact with the heat transfer tube T between the stationary chuck 15 and the stationary chuck 15, and this is a guide bracket, though not given a reference numeral.

The specific form of the guide bracket is not limited, and may be a circular ring or a semicircular base, provided that the heat transfer pipe T can be guided.

By providing the gauge bracket and the fixing chuck 15, a worker can mount the heat transfer tube T having a maximum length of 28 m on the inner surface degreasing unit 10 to perform the inner surface degreasing operation.

On the other hand, the inner degreasing unit 10 injects the high-pressure air and the degreasing liquid into the opened side of the heat transfer pipe T, and discharges the degreasing liquid or the like, which has been degreased, from the opened side of the heat transfer pipe T.

As shown in FIG. 2, a drain pipe 17 is provided to surround the other side of the heat transfer pipe T, and a degreasing liquid discharged from the other side of the heat transfer pipe T is filled therein.

Particularly, the drainage trough 17 is provided with a filtering net 175 to filter foreign matter such as grease to be mixed with the degreasing liquid discharged from the other side of the heat transfer pipe T by the sieve 175.

The degreasing liquid or the like filtered by the filtering wire 175 is filled in the drain tank 17 and then transferred to the storage tank 31 such as a degreasing solution along the first to third return pipes.

Here, first to third return valves for connecting the first to third drain pipes to the drain canister 17 are provided.

The first recovery valve 171 opens the first recovery pipe to transfer the preliminary degreasing solution to the preliminary degreasing solution storage tank when the preliminary degreasing solution is filled in the drainage tank 17 and the remaining second recovery valve 172 And the third recovery valve 173 blocks the second and third recovery pipes, respectively.

When the degreasing solution is filled in the drainage tank 17 by the same principle, only the second recovery valve 172 opens the second recovery pipe, the remaining recovery pipe is shut off, and the drainage tank 17 is filled with the tincture solution The third valve opens only the third return pipe and the remaining return pipe is shut off.

The first to third collecting valves 173 are connected to the bottom of the bottom of the drain canister 17. At this time, the bottom of the drain canister 17 is formed so as to form a gradient so that the first collecting valve 171 is connected to the drain canister 17, It can be connected to the lowest position of the floor.

The reason for this is that since the preliminary degreasing is performed first, the preliminary degreasing liquid having the highest degree of contamination among discharged degreasing liquids or the like becomes the preliminary degreasing liquid, so that the preliminary degreasing liquid is drained when the preliminary degreasing liquid is drained in the drainage tank 17 .

Even if the preliminary degreasing solution remains on the floor, the preliminary degreasing solution remaining in the second or third recovery pipe through the second or third recovery valve 173 is prevented from entering.

2, the first to third supply pipes 32 for transferring the degreasing liquid and the like from the storage tank 31 such as the degreasing liquid to the degreasing unit 10 are connected to the bubble generating nozzle 11 do.

In this case, the first to third supply nozzles are provided to control the entry and exit according to the kind of the degreasing solution and the like injected into the bubble generating nozzle 11.

The first supply nozzle connects the first supply pipe 32 and the bubble generating nozzle 11 and the second supply nozzle connects the second supply pipe 32 and the bubble generating nozzle 11, The third supply pipe 32 and the bubble generating nozzle 11 are connected.

Meanwhile, the inner surface degreasing unit 10 may further include a cut-off plug for preventing the degreasing liquid or the like from being discharged to the other side of the heat transfer pipe T in a state where the heat transfer pipe T is filled with the degreasing liquid or the like.

Although not numbered in FIG. 1, a cut-off plug which is coupled to the other side of the heat transfer tube T in the inner degreasing section 10 is simply shown.

When the cut plug is coupled to the other side of the heat transfer pipe T with the degreasing liquid filled in the heat transfer pipe T, the inner surface of the heat transfer pipe T is called the oil mist by the degreasing liquid or the like, It is possible to remove foreign matter on the inner surface more efficiently by separating the cleaning liquid T from the cleaning liquid T and injecting the degreasing liquid and the like into the heat transfer pipe T again.

The degreasing method by the inner surface degreasing unit 10 constructed as described above is as follows.

The first supply valve 191 is opened to supply the preliminary degreasing liquid from the first supply pipe 32 to the bubble generating nozzle 11 so that the preliminary degreasing liquid and the air are supplied to the heat transfer tube T, As shown in Fig.

At this time, the other side of the heat transfer pipe T may be closed during the injection process with the interrupting plug as described above, and then opened again.

The preliminary degreasing solution filled in the drainage tank 17 during the preliminary degreasing process or after the preliminary degreasing is finished opens the first recovery valve 171 and sends it to the preliminary degreasing solution storage tank 311 through the first recovery pipe.

In the same way, degreasing and bathing are carried out.

However, if the pre-degreasing liquid discharged to the other side of the heat transfer pipe T during the preliminary degreasing process is contaminated due to the degree of contamination, it may not be sent to the pre-degreasing liquid storage tank 311 but may be sent to the sewage treatment facility without being recirculated .

Because the pre-degreasing solution is the first degreasing solution, it is most contaminated and can be contaminated to the extent that it can no longer be used.

At this time, the degreasing solution is supplied to the preliminary degreasing solution storage tank 311 whose water level is gradually lowered, so that the preliminary degreasing solution storage tank 311 can be filled again. In this case, if the degreasing solution is sent to the preliminary degreasing solution storage tank 311, the degreasing solution may be replenished by injecting the degreasing solution prepared from the outside into the degreasing solution storage tank 312.

Since the preliminary degreasing solution is contaminated, the preliminary degreasing solution can be performed even if the continuously used degreasing solution is injected into the preliminary degreasing solution storage tank 311 to replenish it, rather than newly prepared and replenished. It is because it is effective to make defective more reliably by making it from outside and replenishing it.

The process of replenishing the degreasing solution with the preliminary degreasing solution storage tank 311 may be performed not by providing a connection pipe through which the degreasing solution can be directly exchanged between the degreasing solution storage tank 312 and the preliminary degreasing solution storage tank 311, It is preferable to carry out the degreasing solution filled in the drainage tank 17 to the preliminary degreasing solution storage tank 311 instead of the degreasing solution storage tank 312. [

To this end, a collection box 34 is provided so that the first to third collection pipes can be assembled in a single container, rather than directly connected to the storage tank 31 such as a degreasing liquid.

Therefore, the first to third collecting tubes are all connected to the collecting tank 34 once, and the transfer tube for transferring the degreasing liquid or the like recovered in the collecting tank 34 to the storage tank 31, 34 and a storage tank 31 such as a degreasing liquid.

At this time, when the preliminary degreasing solution is filled in the recovery tank 34, the preliminary degreasing solution is transferred to the preliminary degreasing solution storage tank 311 through the first transfer pipe. When the degreasing solution is filled in the recovery tank 34, And transfers the degreasing solution to the degreasing solution storage tank 312 through the third transfer pipe when the recovery tank 34 is filled with the tanset solution. Also, a fourth transfer pipe for connecting the recovery tank 34 and the wash water storage tank 314 may be installed to recover the wash water used in the outer surface degreasing unit 20 to be described later.

However, when the degreasing solution is filled in the recovery tank 34 when the degreasing solution is transferred to the preliminary degreasing solution storage tank 311 and replenished as described above, the degreasing solution is supplied through the first transfer pipe To the pre-degreasing liquid storage tank (311).

Hereinafter, the configuration and operation of the outer surface degreasing unit 20 will be described with reference to FIG.

For reference, the heat transfer pipe T having undergone the inner degreasing process may be subjected to an air flushing process before being sent to the outer surface degreasing unit 20. This is because even if the inner degreasing process is completed, foreign materials, degreasing chemicals, or water that have not been removed can remain on the inner surface of the heat transfer pipe T.

As shown in FIG. 5, the outer surface degreasing unit 20 is provided with a nozzle chamber 21.

The nozzle chamber 21 is formed so as to cover a part of the entire heat transfer tube T in the longitudinal direction of the heat transfer tube T. [

The nozzle chamber 21 is formed as an airtight structure that is entirely blocked from the outside, and a through hole is formed on one side and the other side so that the tube of the heat transfer tube T can pass through the nozzle chamber 21. [

At this time, a hermetic member 27 may be provided in the through-hole on one side and the other side of the nozzle chamber 21 so as to prevent the degreasing solution and the like from leaking into the gap between the inner circumferential surface of the through hole and the outer circumferential surface of the heat transfer tube T.

The heat transfer tube T can pass through the inside of the nozzle chamber 21 and the heat transfer tube T can completely pass through the inside of the nozzle chamber 21 to degrease the entire outer peripheral surface of one heat transfer tube T .

The nozzle chamber 21 is provided with a plurality of injection nozzles 26 therein and the tips of the nozzles are directed to the outer circumferential surface of the tube T to perform degreasing by spraying a degreasing liquid or the like onto the outer circumferential surface of the tube T .

The hermetic member 27 is a member which slips easily so that the progress of the heat transfer tube T is not disturbed due to the frictional force generated between the outer surfaces of the heat transfer tube T passing the hermetic member 27, And is made of an elastic material, so that the outer peripheral surface of the heat transfer tube T can be resiliently pressed.

The fourth supply pipe 32 is connected to the first nozzle chamber 211 in order and the fifth supply pipe 32 is connected to the second nozzle chamber 212 and the sixth supply pipe 32 is connected to the third nozzle chamber 211, And the seventh supply pipe 32 is connected to the fourth nozzle chamber 214 so that the degreasing liquid or the like is supplied to the first to fourth nozzle chambers 214. Therefore, The degreasing liquid or the like is sprayed from the discharge port 26 toward the outer peripheral surface of the heat transfer pipe T. [

Even if the heat transfer tube T passes through the first to fourth nozzle chambers 214 due to the hermetic member 27, the degreasing liquid or the like in the first to fourth nozzle chambers 214 does not leak out to the outside, 1 to the fourth nozzle chamber 214 are filled with a degreasing liquid or the like.

Therefore, foreign matter such as processing oil adhered to the outer circumferential surface of the heat transfer pipe T is called in the first to fourth nozzle chambers 214 filled with the degreasing liquid or the like, so that foreign matter on the outer circumferential surface of the heat transfer pipe T is more effectively removed .

The length from the first nozzle chamber 211 to the end of the fourth nozzle chamber 214 may be shorter than the total length of the heat transfer tube T. In this case, the entire heat transfer tube T passes through the first to fourth nozzles, In the outer circumferential surface of the tube T, four degreasing processes from preliminary degreasing to washing are all performed.

On the other hand, in the first to fourth nozzle chambers 214 and the first to fourth nozzle chambers 214, the heat transfer tube T stably passes through the first to fourth nozzle chambers 214 A tube guide for guiding the tube can be installed.

The tube guide may be formed by an idler roller 25 supporting the lower portion of the heat transfer tube T and the shape of the idler roller 25 may be a shape curved in a semicircular shape corresponding to the lower shape of the heat transfer tube T have.

A driving roller 23 for actively advancing the heat transfer tube T may be separately provided when the tube guide is the idler roller 25 that only guides the heat transfer tube T. [

6, one of the first to fourth nozzle chambers 214 is shown in more detail than FIG.

As shown in FIG. 6, the first to fourth nozzle chambers 214 may be cylindrical.

The injection nozzles 26 provided in the respective nozzle chambers 21 are installed to face the outer circumferential surface of the heat transfer tube T passing through the respective nozzle chambers 21.

In FIG. 6, the injection nozzle 26 is installed at two points along the longitudinal direction of the heat transfer pipe T in one nozzle chamber 21, and at one of the two points, the injection nozzle 26 As shown in FIG. However, the number of the points where the injection nozzle 26 is provided in one nozzle chamber 21 along the longitudinal direction of the heat transfer pipe T and the number of the nozzle chambers 21 provided at one point are not limited to those shown in FIG. 6 And Fig. 6 is only one embodiment of the number and locations of the nozzle chambers 21 to be installed.

Here, the installation positions of the four injection nozzles 26 installed at two points in one nozzle chamber 21 are shown to be different from each other at two points.

In other words, in FIG. 6, one injection nozzle 26a is arranged on the upper and lower and left and right sides of the outer circumferential surface of the tube T, and at another point, the injection nozzle 26b forms two X- One at each end of the two diagonal lines.

The reason for this is to perform the degreasing evenly on the entire outer peripheral surface area of the heat transfer pipe T.

However, the arrangement of the injection nozzles 26a and 26b is not necessarily limited to the view of Fig.

Meanwhile, the nozzle chamber 21 itself can be rotated in a direction to wrap the heat transfer tube T to degrease the outer circumferential surface of the heat transfer tube T, if necessary. At this time, the driving means for rotating the nozzle chamber 21 may be any known driving means.

Each of the nozzle chambers 21 is supplied with a degreasing liquid or the like from a storage tank 31 such as a degreasing liquid.

The first nozzle chamber 211 in which the preliminary degreasing is performed is supplied with the preliminary degreasing liquid from the preliminary degreasing solution storage tank 311 through the fourth supply pipe 32. The second nozzle chamber 212, The third nozzle chamber 213 receives the degreasing liquid from the liquid storage tank 312 through the fifth supply pipe 32. The third nozzle chamber 213 receives the degreasing solution through the sixth supply pipe 32 from the bath liquid storage tank 313, The fourth nozzle chamber 214, to which the wash water is supplied, is supplied with the wash water from the wash water storage tank 314 through the seventh supply pipe 32.

Similarly to the inner degreasing unit 10, the fourth to seventh return pipes are connected to the first to fourth nozzle chambers 214 so that the degreasing liquid or the like discharged from the respective nozzle chambers 21 is returned to the recovery tank 34 Recover.

At this time, if the contamination degree of the preliminary degreasing liquid is high, the preliminary degreasing liquid is sent from the recovery tank 34 to the sewage treatment plant, and the degreasing liquid is replenished into the preliminary degreasing solution storage tank 311.

Lastly, in FIGS. 7A and 7B, storage tanks 31 such as a degreasing liquid, which is one of the constituent parts of the circulation part, are shown.

7A shows the preliminary degreasing solution storage tank 311, the degreasing solution storage tank 312, the bath liquid storage tank 313, and the wash liquid storage tank 314 in order from the left. Also shown are pumps 341, 342, 343, 344 which are responsible for transferring or supplying the degreasing liquid.

7B is a front view, side sectional view, and front sectional view showing any one of the storage tanks 31 such as a degreasing liquid.

7B, there is provided a supply port 315 and a discharge port 316 for the degreasing liquid and the like, and a control panel 318 and an overflow port 317 for preventing overflow are provided in the storage tank 31, Respectively.

In addition, since the degreasing liquid must maintain the proper temperature, a temperature sensor and a heater are built in. In particular, the Tanse solution should be maintained at about 50 ° C., and the pre-degreasing solution and the degreasing solution also need to be maintained at an appropriate temperature depending on the kind or acidity of the medicine to be used.

On the other hand, a control unit for manually or automatically controlling each of the components constituting the inner surface degreasing unit 10, the outer surface degreasing unit 20, and the circulation unit may be additionally provided.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. It will be apparent to those of ordinary skill in the art.

T: Heat pipe tube 10: Inner surface degreasing part
11: bubble generating nozzle 15: fixed chuck
17: drain pipe 18: injection pipe
20: outer surface degreasing part 21: nozzle chamber
23: driving roller 24: idler roller
25: idler roller 26, 26a, 26b: injection nozzle
27: Hermetic member 31: Storage tank for degreasing solution
32: first to third supply pipes 34:
41: Great Expectations 42:
43: jet stage 111: degreasing solution inlet
112: air inlet 113: degreasing solution ejecting tube
114: air blowing pipe 115: air blowing port
116: degreasing liquid jetting port 171: first recovery valve
172: Second recovery valve 173: Third recovery valve
175: Filter net 191: First supply valve
192: second supply valve 193: third supply valve
211: first nozzle chamber 212: second nozzle chamber
213: third nozzle chamber 214: fourth nozzle chamber
311: Reservoir for storing preliminary degreasing liquid 312: Reservoir for storing degreasing liquid
313: Tank liquid storage tank 314: Water liquid storage tank
315: Supply port 316: Outlet
317: Overflow tool 318: Control panel
341: first pump 342: second pump
343: third pump 344: fourth pump
354: fourth supply valve 355: fifth supply valve
356: sixth supply valve 357: seventh supply valve

Claims (12)

A degreasing system for cleaning a heat transfer pipe (T) having open sides on both sides thereof,
An inner surface degreasing unit 10 for spraying the cleaning liquid at a high speed into the opened one side of the heat transfer pipe T,
A nozzle chamber 21 surrounding a part of the outer circumferential surface of the heat transfer pipe T and having an injection nozzle 26 therein is provided so that the heat transfer pipe T passes through the inside of the nozzle chamber 21, (20) for spraying a degreasing liquid onto the outer peripheral surface of the heat transfer pipe (T) passing through the inside of the heat transfer pipe (21) by the injection nozzle; And
A cleaning liquid supply pipe 32 for supplying the cleaning liquid from the cleaning liquid storage tank to the inner surface degreasing unit 10 and the outer surface degreasing unit 20 and a cleaning liquid supply pipe 32 for discharging the cleaning liquid from the inner surface degreasing unit 10 and the outer surface degreasing unit 20 (T) degreasing system including a circulation part composed of a cleaning liquid recovery pipe for recovering the cleaning liquid to the cleaning liquid storage tank The method according to claim 1,
The inner surface degreasing unit 10 includes a nozzle for injecting the cleaning liquid into one side of the heat transfer pipe T and a drain pipe 17 for receiving and storing the cleaning liquid discharged from the other side of the heat transfer pipe T,
The nozzle has a cleaning liquid inlet port through which a cleaning liquid is injected and an air inlet port through which high pressure air is injected from an air compressor so that the nozzle is a bubble generating nozzle 11 for generating a bubble by jetting a cleaning liquid and air together at an end (T) degassing system. The method according to claim 1,
The outer surface degreasing part 20 includes a driving motor for driving a tube guide and a tube guide for guiding the heat transfer tube T to be passed into the nozzle chamber 21 and a heat transfer tube T for supplying heat to the nozzle chamber 21. [ And a hermetic member (27) provided at an inlet and an outlet of the heat transfer pipe to surround the outer circumferential surface of the heat transfer pipe (T). The method according to claim 1,
Wherein the inner surface degreasing portion and the outer surface degreasing portion are disposed such that longitudinal directions of the heat transfer tube T inserted into the inner surface degreasing portion and the outer surface degreasing portion are parallel to each other. Tube (T) degreasing system. The method according to claim 1,
Wherein the cleaning liquid is any one of a preliminary degreasing liquid, a degreasing liquid, a bath liquid and a wash liquid,
The circulation part is provided between the washing solution collecting pipe and the washing solution storage tank to store the washing solution recovered from the washing solution collecting pipe and to transfer the washing solution to the washing solution storage tank, Further comprising a transfer pipe for transferring the water to the tank,
The washing liquid storage tank comprises a preliminary degreasing liquid tank, a degreasing liquid tank, a hot-water tank, and a flushing tank which are separated from each other,
The cleaning solution supply pipe 32 of the circulation part includes a first supply pipe 32 for supplying the preliminary degreasing solution of the preliminary degreasing solution tank to the degreasing unit 10 and a fourth supply pipe 32 for supplying the preliminary degreasing solution to the degreasing unit 10 and the outer degreasing unit 20, A second supply pipe 32 for supplying the degreasing liquid of the degreasing liquid tank to the degreasing unit 10 and a fifth supply pipe 32 for supplying the degreasing solution to the degreasing unit 10 and the outer surface degreasing unit 20, A seventh supply pipe 32 for supplying the water in the water storage tank to the outer surface degreasing unit 20 and a third supply pipe 32 for supplying the water to the outer surface degreasing unit 20, Lt; / RTI >
The cleaning liquid recovery pipe includes a first recovery pipe through which the preliminary degreasing liquid discharged from the inner surface degreasing unit 10 is transferred to the cleaning liquid recovery tank 34 and a degreasing liquid discharged from the inner surface degreasing unit 10 through the cleaning liquid recovery tank A third recovery pipe that is transferred to the cleaning liquid recovery tank 34 from the inner surface degreasing unit 10 and a third recovery pipe to which the tank washing liquid discharged from the inner surface degreasing unit 10 is transferred to the cleaning liquid recovery tank 34, A fifth recovery pipe to which the degreasing liquid discharged from the outer surface degreasing unit 20 is transferred to the recovery tank 34 and a fifth recovery pipe which is discharged from the outer surface degreasing unit 20, A sixth recovery pipe to which the tannage solution is transferred to the recovery tank 34 and a seventh recovery pipe to which the tannery liquid discharged from the outer surface degreasing unit 20 is transferred to the recovery tank 34,
The transfer pipe includes a first transfer pipe connected to the preliminary degreasing solution tank from the recovery tank 34, a second transfer pipe connected to the degreasing solution tank from the recovery tank 34, , And a fourth conveyance pipe connected to the wash water tank from the recovery box (34). The method of claim 3,
The nozzle chamber 21 includes a first nozzle chamber 211 in which preliminary degreasing is performed, a second nozzle chamber 212 in which degreasing is performed, a third nozzle chamber 213 in which water is supplied, The chambers 214 are arranged in order from the first nozzle chamber 211 to the fourth nozzle chamber 214 in order along the traveling direction of the tube T,
In the first to fourth nozzle chambers 21, the injection nozzles are installed at two or more points in the traveling direction of the heat transfer pipe T, and two or more spray nozzles are installed radially in each of the two or more points. Heat Transfer Tube (T) Degreasing System. The method according to claim 1,
A tube mounting table disposed between the inner surface degreasing unit 10 and the outer surface degreasing unit 20 and an air nozzle for injecting high pressure air into the tube to blow foreign substances inside the heat transfer tube T into the high pressure air (T) degreasing system according to claim 1 or 2, further comprising a foreign matter removing unit for removing the foreign matter. 7. The method according to any one of claims 1 to 6,
Further comprising a control unit for controlling the inner surface degreasing unit (10), the outer surface degreasing unit (20), and the circulation unit. A method for degreasing a heat transfer pipe (T) using a heat transfer pipe (T) degreasing system according to any one of claims 1 to 7,
A first step of spraying a cleaning liquid into one opened side of the heat transfer pipe T with a cleaning liquid supplied from the cleaning liquid tank to remove oil on the inner surface of the heat transfer pipe T;
A second step of recovering and transferring the washing liquid discharged when the washing liquid injected into one side of the heat transfer pipe T is discharged to the other side of the heat transfer pipe T in the step of removing the inner surface oil,
The heat transfer tube tube T from which the inner oil is removed is passed through the nozzle chamber 21 in which the injection nozzle 26 is housed and the cleaning liquid is sprayed onto the outer surface of the heat transfer tube T by the injection nozzle 26, (T) outer surface;
And a fourth step of recovering the washing liquid sprayed on the outer surface of the heat transfer pipe T and transferring the washing liquid to the washing liquid tank. 10. The method of claim 9,
In the first step, high-pressure air is sprayed together with the cleaning liquid into the open one side of the tube. 10. The method of claim 9,
Wherein the cleaning liquid is any one of a preliminary degreasing liquid, a degreasing liquid, a bath liquid and a wash liquid,
The circulation part is provided between the washing solution collecting pipe and the washing solution storage tank to store the washing solution recovered from the washing solution collecting pipe and to transfer the washing solution to the washing solution storage tank, Further comprising a transfer pipe for transferring the water to the tank,
The washing liquid storage tank includes a preliminary degreasing liquid tank, a degreasing liquid tank, a hot-water tank, and a flushing tank,
The first step and the second step are carried out in the order of the preliminary degreasing solution, the degreasing solution and the bath solution, and the first step and the second step are performed for each of the preliminary degreasing solution, the degreasing solution,
The third and fourth steps are performed in the order of the preliminary degreasing solution, the degreasing solution, the tanset solution, and the wash solution, and the third and fourth steps are performed for each of the preliminary degreasing solution, the degreasing solution, However,
And in the second or fourth step, the recovered degreasing liquid is transferred to the preliminary degreasing liquid tank. 10. The method of claim 9,
The second step further includes the step of spraying high-pressure air on the inner surface of the heat transfer pipe T to remove foreign matter on the inner surface of the tube,
There is no temporal relationship between the step of recovering the cleaning liquid discharged to the other side of the heat transfer pipe T in the second step and the step of transferring the cleaning liquid to the cleaning liquid tank and the step of removing foreign matters on the inner surface of the injection path tube of the high- Heat transfer tube (T) degreasing method.

Images